Question

about 4040 calories must be burned to lose 1 lb of body weight. estimate how many calories must be burned to lose 6 lb, to the nearest thousand.
about □ calories must be burned to lose 6 lb.

Explanation:

Step1: Identify the relationship

To lose 1 lb, 4040 calories are burned. To lose 6 lb, we need to multiply the calories per pound by the number of pounds.

Step2: Perform the multiplication

Calculate \( 4040\times6 \). First, approximate 4040 as 4000 for estimation. Then \( 4000\times6 = 24000 \). The actual calculation is \( 4040\times6 = 24240 \), which is approximately 24000 when rounded to the nearest thousand.

Answer:

About 24000 calories must be burned to lose 6 lb.